• Mass Spectrometry Letters
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• 제4권4호
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• pp.83-86
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• 2013

A new interface for coupling CIEF and MS using a four-way cross has been developed in a single mechanical system. This new interface could be operated without the electric discontinuity and reinstallation of lines. Additionally, a bare fused silica capillary was facilitated as a spray needle to produce electrospray and to guide catholyte or sheath liquid. Focusing for CIEF was completed in a hanging droplet at the end of spray needle. This capillary spray needle also provided stable spray, enhanced the ionization efficiency and increased sensitivity. Results with carbonic anhydrase I showed that focusing and spraying were well completed with the new interface and the new spray needle.

• Journal of information and communication convergence engineering
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• 제19권1호
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• pp.16-21
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• 2021

In this paper, to prevent accidents of school vehicles used by students, which have emerged as a continuous social problem, a boarding and leaving notification system using Bluetooth beacons is proposed. The platform structure uses Bluetooth, a smartphone, and an application, and provides real-time message reception between parents and teachers. It is not simply a system with Bluetooth capability alone, but also an IcT technology that is closely related to real life using two-way communication. The purpose is to provide user-friendly ICT technology as an integrated system for more practical effects. Two-way exchange of information between parents and teachers using cloud servers is made possible. By using this Bluetooth beacon notification system, safety accidents in student vehicles are reduced, which brings confidence from traffic accidents to schoolchildren of parents and teachers. Therefore, it is expected that parents and teachers are expected to improve their mental stability and quality of life from traffic accidents.

• 한국수자원학회:학술대회논문집
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• 한국수자원학회 2010년도 학술발표회
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• pp.77-81
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• 2010

This study carried out hydraulic model test for water circulation system in Cheongna district as part of Incheon Free Economic Zone. Canal way project of Cheongna was planned to establish for environment-friendly water circulation system, improve quality of life and diversification of traffic through using boat as a water-friendly international business city. The navigation canal, There are two intake facility in central park and it can purify water 15,000$m^3$ per day. After purify, water move to 8 facility of water culture area which supplies water in canal way. This process called water circulation system in cheongna. Also, there are several flow induction machine in canal way except south-north way. Therefore, this study will verify about validity of water circulation system's safety through hydraulic model test.

• 한국수정란이식학회지
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• 제26권3호
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• pp.153-158
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• 2011

This study was performed in order to simplify the operation and minimize stress of donor and be readily available in the field with low cost and high quality embryos using the Direct Embryo Collection (DEC). Donors, at random stages of the estrous cycle, received a CIDR. 7 days later, 200 mg FSH was treated with 40, 30, 20, 10 mg FSH levels in declining doses twice daily by intramuscular injection for 4 days. On the 3rd day administration of FSH, 25 mg $PGF_2{\alpha}$ was administered and CIDR was withdrawn. After FSH injections were complete, donors were artificially inseminated twice at 12 hr intervals. The donor cattle received 250 ${\mu}g$ GnRH at time of 1 st insemination and embryos were recovered 8 days after the 1st insemination. Embryo collection from superovulated donors was performed to flushing by non-surgical methods of 3-way, 2-way and DEC (l-way). The average number of recovered embryos were 11.25${\pm}$0.63, 12.5${\pm}$0.65 and 11.75${\pm}$0.48 from operations of 3-way, 2-way and DEC methods, respectively. There were no significant differences among the embryo collection methods. Also, The average number of transferable embryos were 6.25${\pm}$0.48, 7.25${\pm}$0.48 and 7.25${\pm}$0.63 from each embryo collection procedures. The number of transferable embryos was no differences among the 3-way, 2-way and DEC methods, respectively. Meanwhile, the ratio of transferable embryos for all recovered embryos from DEC methods was higher as 61.7 % than 55.6 %, 58 % from methods of 3-way, 2-way. And the flushing solution required for recovering embryos by DEC method was significantly lower as 0.28${\pm}$0.32 1 than 1.8${\pm}$0.12 1, 1.75${\pm}$0.10 1 from 3-way, 2-way methods (p<0.05). Also, the time required for recovering embryos by DEC methods was significantly lower as 27${\pm}$2 min than 51${\pm}$3, 45${\pm}$2 min, respectively (p<0.05). In conclusion, these results suggest that DEC method for embryo collection may be effectively used for production of in vivo embryos using less flushing solution and, it might be effectively available in the field compared to conventional embryo recovery methods using 3-way or 2-way balloon catheter.

• 융합정보논문지
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• 제11권7호
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• pp.155-163
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• 2021

본 연구는 대학생의 삶의 만족도에 영향을 미치는 요인을 파악하기 위해 실시되었다. 연구대상자는 일 지역에 위치한 3개 대학의 재학생 191명으로 하였으며, 자료수집은 자가보고 설문지를 활용하였다. 자료분석은 빈도, 백분율, 평균, 표준편차, 독립표본 T검정, 일원배치 분산분석(One way ANOVA), 피어슨의 상관계수(Pearson Correlation Coefficient), 다중회귀분석(Multiple Regression Analysis)을 사용하였다. 연구결과 대상자의 삶의 만족도에 영향을 미치는 유의한 요인은 자아존중감과 학교생활 만족도로 나타났으며 영향요인에 따른 설명력은 42.3%로 나타났다. 연구결과는 대학생의 자아존중감과 학교생활 만족도 향상이 대학생의 삶의 만족도를 높여주는데 도움이 될 수 있다는 것을 시사한다. 따라서 향후 대학생의 삶의 만족도 향상을 위한 교육프로그램 개발 시 자아존중감과 학교생활 만족도 증진을 위한 고려가 필요할 것으로 생각된다.

• 한국소성가공학회:학술대회논문집
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• 한국소성가공학회 1999년도 단조 심포지엄
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• pp.141-146
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• 1999

In the stage of process design, many factors affecting tool life should be considered. Wear, Damage Accumulation and excessive die Stress are those. Most Engineer think wear and damage accumulation affection deeply to the cold forging dies and wear for the hot forging dies. In this report, the example that wear and stress distribution affect tool life in hot forging together will be introduced and the way to solve that problem using Finite Element Method.

• 농촌계획
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• 제15권3호
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• pp.47-60
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• 2009

The discussion of this paper is concerned with the epistemology of urbanism and rurality, that is, the justification of certain knowledge claims about how to intervene in understanding of urban and rural way of life and their implications to space. It is not concerned with the search for "truth" as such, but rather with the construction and presentation of knowledge as truth that subsequently lead to interpretation in the form of scholarly arguments. Rural areas vary considerably, and we define it as of a socially constructed category and so does urban as a comparative construction. As with community, rurality has been defined in widely different ways so has urbanism. In identifying and interconnecting these two concepts, we incorporate diverse western epistemologies such as empiricism and pragmatism. In addition, we heed particular attention to the intellectual history of Silhak, a philosophical ideology of Korea, to identify the relationships and it's effect on social way of life encompassing the realm of rural and urban spaces. We found that Silhak is particularly useful in that it deals with substantive issues of the relationship between rurality and urbanism arising from the discordance between values and perceive conditions of the rural and urban way of lives. This paper argues that the epistemology of Silhak is particularly superior to those of western ideologies since it accentuates unity of spaces rather than differentiating urban and rural way of life. We concludes with demanding more studies in the field of urban and rural analyses incorporating more diverse concepts of Korean orthodox epistemology.

• 대한기계학회:학술대회논문집
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• 대한기계학회 2007년도 춘계학술대회A
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• pp.903-908
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• 2007

A retractor is the major component of a seatbelt system that restraints passengers by locking the movement of webbing. Recently, in order to increase the effectiveness of seatbelt systems, motorized retractors that remove slack and correct passenger posture just before airbag expansion when collision is predicted are widely used. Key component of motorized retractors is the one-way clutch that engages and disengages the winding action of webbing according to the direction of motor revolution. Analytical investigation of action of the one-way clutch mechanism has been carried out to figure out conditions for one-way locking, and to study the effect of various kinematic and dynamic design variables of one-way clutch. Using combination of ADAMS and LifeMOD soft-wares, dynamic simulation of operation of motorized retractors including Hybrid-III dummy model has been carried out to evaluate the performance of the motorized retractors in various crash scenarios.

• 한국콘텐츠학회논문지
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• 제17권2호
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• pp.219-229
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• 2017

본 연구는 초등학생 검도수련생의 라이프스킬의 변화를 규명하는데 목적이 있다. 이를 위해 579명의 초등학생을 대상으로 연구를 진행하였고, 탐색적 요인분석과 신뢰도검증 및 확인적 요인분석 과정을 거쳐 초등학교 검도수련생의 라이프스킬을 개념화 하였다. 이 결과를 바탕으로 초등학생이 인식하는 라이프스킬의 차이를 성별과 경력에 따라 분석하기 위해 One-way MANOVA를 실시한 결과는 다음과 같다. 첫째. 초등학생이 검도수련을 통해 발달하는 라이프스킬은 성품, 사회기술, 문제해결기술, 건강관리 4요인으로 나타났다. 둘째. 검도수련에 따른 라이프스킬의 성차는 없었으며, 검도수련 경력에 따라서는 사회기술, 건강관리에서 차이를 보였다. 또한, 검도수련 초등학생의 일상생활만족에 영향을 주는 라이프스킬요인은 사회기술, 문제해결기술, 성품 순으로 나타났다.

• 대한가정학회지
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• 제39권11호
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• pp.43-62
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• 2001

This study investigated the relationships among Selection, Optimization, and Compensation(SOC) as strategies of life management in mid-life crisis respect to gender and age. The subjects of this study were 170 females and 182 males at the ages between 40 and 60 living in Seoul. Selection, Optimization, and Compensation(SOC) as strategies of life management were assessed by SOC-questionnaire while mid-life crisis was assessed by Mid-Life Crisis Scale. The data were analyzed using frequencies, percentiles, means, standard deviations, Cronbach's $\alpha$, two-way ANOVAS, and Pearson's correlations. Except compensation there was no significant difference in Selection and Optimization as strategies of life management as a function of gender and age. No signigicant difference was found in mid-life crisis as a function of gender and age. There were significant negative correlations among Selection, Optimization, and Compensation(SOC) as strategies of life management and mid-life crisis except the individuation.